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Dimitris Tselentis has successfully defended his PhD dissertation titled: Benchmarking Driving Efficiency using Data Science Techniques applied on Large-Scale Smartphone Data. This PhD thesis was carried out at the Department of Transportation Planning and Engineering at the School of Civil Engineering of the National Technical University of Athens under the supervision of Prof. George Yannis. The main objective of this PhD is to provide
a methodological approach for driving safety efficiency benchmarking on
a trip and driver basis using data science techniques. It also
investigates the way to achieve this by defining a safety efficiency
index based on travel and driving behaviour metrics collected from
smartphone devices. Furthermore, the present doctoral research proposes a
methodological framework for identifying the least efficient trips in a
database and for estimating the efficient level of metrics that each
non-efficient trip should reach to become efficient. Finally, this
dissertation’s objective is to study the temporal evolution of driving
efficiency and identify the main driving patterns and profiles of the
driver groups formed.  
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Latest Developments
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The International Transport Forum ( ITF/OECD)
published recently a new Report: “Safer City Streets: Global
Benchmarking for Urban Road Safety”, with the active contribution of NTUA. This document aims to support cities in setting road safety targets and to monitor progress in improving urban road safety.
Pedestrians, cyclists and motorcyclists account for nearly 80% of urban
traffic fatalities. Cities should thus intensify efforts to improve the
safety of vulnerable road users. This document presents traffic safety
indicators for different road user groups collected in 31 cities
worldwide to facilitate the evaluation, monitoring and benchmarking of
road safety outcomes. It places a particular attention on measuring the
risk of fatality per unit distance traveled. 
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The European Commission’s Directorate General for Mobility and Transport ( DG Move)
published the Final Report of the “Study on powered two-wheeler and
bicycle accidents in the EU, SaferWheels”, with the active contribution
of NTUA.
The SaferWheels study was conducted to investigate accident causation
for traffic accidents involving powered two-wheelers and bicycles in the
European Union. The objective of the study was to gather PTW
and bicycle accident data from in-depth crash investigations, obtain
accident causation and medical data for those crashes, and to store the
information according to an appropriate and efficient protocol enabling a causation-oriented analysis.
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The European Commission’s Directorate-General for Research and Innovation
published a Report titled “Analysis of the state of the art, barriers,
needs and opportunities for setting up a Transport Research Cloud”, with
the active contribution of NTUA Professor George Yannis. This Report focuses on the requirements for data sharing within the transport research community.
In particular, the Report examines the potential of a Transport
Research Cloud (TRC) as a subset of the European Union’s European Open
Science Cloud (EOSC) initiative. Six domain experts collected data based
on their personal experiences, contacts, prior research and a survey
sent out to other researchers in the transport domain to enable a
preliminary analysis concerning the needs, barriers and potential
benefits for the domain should a TRC be realized. Road Safety
constitutes a major component of this Transport Research Cloud.
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UNECE celebrates
the 50th anniversary of Vienna Conventions on Road Traffic and on Road
Signs and Signals, 1968-2018. At the turn of their 50th anniversary, the
Vienna Conventions on Road Traffic and on Road Signs and Signals from
1968 are more relevant than ever. Whether helping to address the most
critical road safety needs, or facilitating the development of automated
driving functionalities, reference to these legal texts, which are
evolving with technological developments, is a necessity for countries
around the world. The two Conventions have a global scope and are
important frameworks facilitating international road traffic through uniform traffic rules and harmonized road signs, signals, symbols and markings. 
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Statistics Corner
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On the occasion of the World Day of Remembrance for Road Traffic Victims, the European Commission presented the final Road Safety Figures for 2017, which show for the second year in a row a decrease by 2% of road fatalities in the EU compared to the previous year. European Coordinator for Road Safety Matthew Baldwin said: “ Whilst
European roads are the safest in the world, the downward curve has
flattened out in past years. We still have many challenges ahead of us: I
especially think of vulnerable road users, who– as the figures show-
are making up a larger share of the casualties, especially in urban
areas. We need an active, cooperative, holistic approach amongst all
stakeholders to implement what we know needs to be done – the Safe
System“.
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The Eurostat Regional
Yearbook 2018 provides a detailed picture relating to a broad range of
statistical topics across the Regions of the EU Member States, as well
as the Regions of the EFTA and candidate countries, including the European Regions with the lowest and highest road accident rates.
Each chapter presents statistical information in maps, tables, figures
and infographics, accompanied by a descriptive analysis highlighting the
main findings.
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Our Publications
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UNECE and the Ministry of Economy and Sustainable Development of Georgia
organised a Workshop titled: “National Road Safety Policy development –
trends and challenges| which was held with great success in Tbilisi,
Georgia on 13-14 November 2018. The aim of the workshop was to strengthen
the knowledge of Central Asia, Caucasus and East-Europe countries on
how to define national road safety policy and improve road safety
situation. As such, the workshop helped participants to better
understand international and regional best practices on road safety
management, collection and utilization of robust and reliable road
safety statistics and tools (SafeFITS, and RSPR) and methodologies for
setting up road safety strategic goals. NTUA actively contributed with the following presentations:
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Ethos Events in collaboration with the financial and business portal banks.com.gr
and the magazine CHRIMA organized with great success the 2nd Auto Forum
titled: “Change your car!” on 7 November 2018 in Athens. The focus was
on the latest technological advances in the field of passive safety in the automotive sector
and the need for consumers to understand the potential of the new
technology in order to “escape” untouchable or at least slightly injured
after a violent collision caused by a traffic accident.
NTUA actively contributed with the following presentation: The Road to Traffic Automation
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A paper titled “ Identification of patterns of driver speeding behaviour and safety margins from tangent to curve” authored by Eleonora Papadimitriou, Stergios Mavromatis, Dimosthenis Pavlou and George Yannis is
now published in Advances in Transportation Studies. This paper
presents a novel definition of drivers’ safety margins reflected in
speed profiles on a tangent to curved road design. These safety margins
are based on a vehicle dynamics model, which is implemented to assess
the speed variation at impending skid conditions from tangent to curve
on the basis of several parameters. Data from a driving simulator
experiment are used to test the proposed methodology, explore driver’s
speed profiles and the parameters affecting drivers’ safety margins. The
results suggest that drivers’ safety margins towards the
examined curve are considerable, with the majority of the drivers using
less than 55% of the available vehicle engine power. 
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A Diploma Thesis titled “ Impact of economic, social and transport indicators on road safety during the crisis period in Europe”
was presented by Dimitrios Nikolaou in July 2018. For this analysis a
database containing Human Development Index (HDI), suicides,
passenger-kilometers and road fatalities for European states for
2006-2015 was developed. The results led to the conclusion that Human Development Index has the most important impact
and its increase leads to road fatalities decrease. Moreover, the
economy evolution effect on road accidents is more important than social
and transport indicators. Especially after the economic crisis, the
impact of the economy is even higher. Passenger-kilometers were also
found with increased impact on the number of road fatalities after the
economic crisis.
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Upcoming Events
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The Hellenic Institute of Transportation Engineers (HITE) and the Hellenic Institute of Transport (H.I.T.) are co-organizing the 9th International Congress on Transport Research (ICTR), which will be held on 24-25 October 2019, in Athens, Greece.
The spotlight theme of the 2017 Congress is: “Transportation 4.0: The
Smart Evolution”. ICTR 2019 will host innovative research and
development work in the field of transportation systems, operations and
infrastructures, in Greece and abroad. The Congress objective is to
showcase recent top-notch research activities in transportation, merge
research findings and policy making tasks, facilitate the exchange of
knowledge in the local and international level and draw conclusions and
shape recommendations on the future of transportation.
Abstract Submission due to 15th January 2019.
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